Cully furniture buys two products for resale: big shelves (b) and medium shelves (m). each big shelf costs $500 and requires 100 cubic feet of storage space, and each medium shelf costs $300 and requires 90 cubic feet of storage space. the company has $75,000 to invest in shelves this week, and the warehouse has 18,000 cubic feet available for storage. profit for each big shelf is $300 and for each medium shelf is $150. in order to maximize profit, how many big shelves (b) and how many medium shelves (m) should be purchased? b = 90, m = 75 b = 150, m = 0 b = 0, m = 200 b = 100, m = 100